Organic thin-film transistors based on alkoxynaphthalene end-capped divinylbenzene

Abstract

The new organic semiconductor, which is composed of a divinylbenzene core unit and alkoxynaphthalene on both sides, 1,4-bis-2-(6-hexyloxy)naphthalen-2-yl-vinylbenzene, was synthesized via Wittig reaction. The obtained oligomer was characterized via FT-IR, mass and elemental analysis, UV-visible spectroscopy, cyclovoltammetry, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The vacuum-evaporated film was characterized via X-ray diffraction and atomic-force microscopy (AFM). It formed a highly ordered polycrystalline vacuum-evaporated film and exhibited a good field-effect performance, with a hole mobility of 0.015cm2/V?s, an on/off ratio of 1.18×105, and a subthreshold slope of 0.69 V when it was deposited at Ts=90°C on HMDS-treated SiO2. ? 2009 Taylor & Francis Group, LLC.